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Question

Sum of interior angles of a polygon of n sides = _____.

A
(2n - 1) × 90°
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B
(2n - 4) × 90°
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C
(2n - 2) × 90°
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D
(4n - 2) × 90°
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Solution

The correct option is B (2n - 4) × 90°
Sum of all interior angles of a polygon = (n-2) × 180⁰

Sum of all interior angles of a polygon = (n-2) × 2 × 90⁰

Sum of all interior angles of a polygon = (2n-4) × 90⁰.

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